How Long Will A Full 12.5kg Cooking Gas Cylinder Bottle Last?

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There are many factors that could determine this. However, more of this depends on the type of food you do cook, the hours you spend cooking them. Some will last about 2 - 3 weeks cooking twice a day; assuming two hours cook time per meal. This also depends on the type of cooking appliance and utensils used. Some pots or pans could take time to absorb heat or allow heat pass through them. You can use a pressure cooker; a strong metal pot worth a tight lid that cooks food quickly by steam under high pressure.

A 12.5kg gas cylinder bottle will last even longer on lower settings or if only one burner is turned on. How long a gas cylinder last depends on so many factors - how often you are cooking, how many hobs you have, how long you use the gas on full, and even the weather conditions such as being cold or hot.

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We could also say that the type of gas regulator used can greatly affect how long LPG gas last. Each gas cylinder bottles hold a different amount of LPG and each gas regulator has a flow rate, so assuming you turn the gas on full flow:

Cylinder         Regulator Rate       Time

12.5kg                  0.8kg/hr           3-5 hours

Some gas regulators (low pressure), release less LPG gas out of cylinder bottles.